<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/lyh.png" alt="">
                <h3>X&nbsp;后台管理系统</h3>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主体区域-->
        <el-container>
            <!--侧边栏-->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-btn" @click="toggleCollapse">|||</div>
                <!--侧边栏菜单区域-->
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409BFF"
                         unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                <!--一级菜单-->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                    <!--一级菜单的模板区域-->
                    <template slot="title">
                        <!--图标-->
                        <i :class="iconsObj[item.id]"/>
                        <!--文本-->
                        <span>{{ item.authName }}</span>
                    </template>

                    <!--二级菜单-->
                    <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children"
                                  :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                        <template slot="title">
                            <!--图标-->
                            <i class="el-icon-menu"/>
                            <!--文本-->
                            <span>{{ subItem.authName }}</span>
                        </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
            </el-aside>
            <!--右侧内容主体-->
            <el-main>
                <!--路由占位符-->
                <router-view/>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        name: "Home",
        data() {
            return {
                menulist:[], //左侧菜单数据
                iconsObj:{
                    '125':'el-icon-user-solid',
                    '103':'el-icon-s-release',
                    '101':'el-icon-s-goods',
                    '102':'el-icon-s-order',
                    '145':'el-icon-s-data'
                },
                //是否折叠
                isCollapse:false,
                //被激活的链接地址
                activePath:'',
            }
        },
        created() {
            this.getMenuList();
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        methods: {
            logout(){
                window.sessionStorage.clear();
                this.$router.push('/login')
            },
            //获取所有的菜单
           async getMenuList(){
               const { data:res } = await this.$http.get('menus');
               if(res.meta.status !==200) return this.$message.error(res.meta.msg);
               this.menulist = res.data;
               //console.log(res);
           },
            //点击按钮,切换菜单的折叠与展开
            toggleCollapse(){
                this.isCollapse=!this.isCollapse;
            },
            //保存链接的激活状态
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath);
                this.activePath = activePath;
            }
        }
    }
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
    }
    .el-header{
        background-color: #373D41;
        display: flex;
        justify-content: space-between;
        align-items: center;
        color: #fff;
        font-size: 13px;
        > div {
            display: flex;
            align-items: center;
            h3 {
                margin-left: 10px;
            }
        }
    }
    .el-aside{
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }
    .el-main{
        background-color: #EAEDF1;
    }

    .toggle-btn {
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
        user-select: none;
    }
</style>